Imagine there’s no heaven. It’s easy if you buy. At New York City’s storied Dakota co-op at 1 W. 72nd St., a four-bedroom, 2.5-bathroom residence is available for sale asking $6.2 million.

The copywriter behind the long-running “I’m Worth It” ad campaign for L’Oreal hair color turns out to have had a Central Park co-op that was worth a notable amount. The estate of Ilon ...